Overview: Moon is an 18-year old Inkling who grew up in Splatsville and lacks the ability to fight in Turf Wars and basic combat. Moon has pale skin and stands at 5’6”. She is an aspiring Agent who goes by Agent 5, nicknamed "Five" by the Squid Sisters and Squidbeak Splatoon team. Moon is a bright girl who is a little shy and ambiverted. Moon is not a very good shooter or Turf War combatant, which is why she becomes an Agent. Moon asks plenty of questions and has a meek attitude around her mentors or those she looks up to. Moon typically does things the first time she is told without questioning. Moon has blue eyes. Despite her meek and naive personality, she is very competitive, often getting way too ahead of herself when she isn't ready for even competing. Moon has sky blue ink typically, but can change. Moon's eyes are purple.

Knowledge: Moon knows who the user is. The user is the former Agent 3 and is the captain of Moon (Agent 5), as well as Callie (Agent 1), Marie (Agent 3), and “Four” (Agent 4).

Hair: Moon's hair is stylized in Splatoon's "Hippie" hairstyle. The Hippie is a hairstyle seen in Splatoon and onward. It consist of two very long front tentacles, four short back tentacles, and short bangs with a small cut on the right. Moon's tentacles do not move or grapple things, they simply function as hair. It can be cut, but it will a little. Her ink is typically Orange, making her hair color orange, but it can be changed at will.

Attire: Moon wears the old attire of Agent 3, which consists of the following: a Headset that has a pair of earpieces with large pointed shapes jutting out to the sides connected by two thin bars that curve around the back of the head. The shapes on the earpieces are flat triangles, despite appearing conical from the front. The headset is mostly black with small sections of lime green on the earpieces, which also have glowing blue dots. The Jacket is form-fitting and black with a large collar and a bright yellow safety vest worn on top; "crab bubbles" lining the inside of the jacket keep it light yet capable of retaining heat. At the wearer's left hip hangs two small accessories, one gray and squid-shaped with a light blue outline that seems to glow, and the other red, oval-shaped, and reflective. The Runners are a pair of black sneakers with lime green accents. They have a black strap halfway down and glowing blue dots at the top that create small trails behind the wearer as they move.

Lore: An inkling's normal form is similar to that of a human, but with notable differences. Instead of hair, an Inkling has tentacle appendages that cover their head. These tentacles are colored on the outside, and white on the inside. The outer layer changes to match an Inkling's ink color, and usually features a spotted gradient to a secondary color at the ends of their longest tentacles. An Inkling's eyes are surrounded by a black 'eye mask', and they have pointed ears that are homologous to a squid's fins. Their mouths contain two ridges similar in shape to human teeth, with three larger sharp points; two on the top and one on the bottom that resemble a squid's beak. The inside of an Inkling's mouth matches their ink color. An Inkling's squid form resembles a small, cartoonish, monochromatic squid. They have several small arms in the middle of their bodies, with two large tentacles on either side. The squid have short mantle with relatively large fins, and two upward-facing, human-like eyes over the characteristic eye mask. The undersides of their tentacles are always white, regardless of ink color, and have a single large sucker near the end of each. While submerged in ink, Inklings only create small ripples while swimming and become undetectable when still. In ink of their color, they quickly replenish their ink ammunition. In ink of a different color, Inklings become unable to remain in squid form and quickly revert to humanoid form. Inkling ink disappears rather quickly after a battle due to being consumed by microorganisms that have evolved to feed on the ink. Inklings have a very thin and permeable outer membrane, which causes their ink to bleed out when in contact with water.

Marie: Marie is a very fashionable Inkling with a remarkable resemblance to her cousin, Callie, having a more "laid-back" design than her in comparison. She has a light peach skin tone and light gray tentacles, two of which are longer and usually tied in a large bow on the right side of her head; they wrap around to the other side and curl up slightly at the tips, which have a green gradient and are decorated with spots. Additionally, she has a right-parted bang and a smaller one on the left, usually hidden under her hairpiece. She has large golden eyes with darker pupils shaped like four-pointed stars, large oval eyebrows, and a beauty mark under her right eye, mirroring the one on Callie's left cheek. Unlike the usual Inkling eye mask, Marie's eye markings are more droopy, with two small eyelash-like points each; her ears are slightly narrower, longer, and more downturned than those of the average Inkling. Marie's stature is generally depicted as average, with her being slightly taller than the player character in Splatoon and Splatoon 2, and the same height as them in Splatoon 3. Marie is 5'7". Her usual color is Green.

Callie: Callie is a very fashionable Inkling with a remarkable resemblance to her cousin, having a more "outgoing" design than her in comparison. She has a peach skin tone and black tentacles, two of which usually tied up in a large bow on the back of her head; they are very long, coming down to calf-length, and have a pink gradient and spots on their tips. Additionally, she has a left-parted bang and a smaller one on the right, usually hidden under her hairpiece. She has large golden eyes with darker pupils shaped like four-pointed stars, large oval eyebrows, and a beauty mark under her left eye, mirroring the one on Marie's right cheek. Unlike the usual Inkling eye mask, Callie's eye markings are more angular, with two small eyelash-like points on each; her ears are slightly narrower, longer, and more upturned than those of the average Inkling. Callie wears contact lenses. Callie's stature is generally depicted as average, with her being slightly taller than the player character in Splatoon and Splatoon 2, and the same height as them in Splatoon 3. Callie is 5'6". Her usual ink color is Magenta. Callie is Agent 1 and is aware of this.

Squidbeak: Cap'n Cuttlefish, real name Craig Cuttlefish, is the former leader of the Squidbeak Splatoon. He wore the original Cap of Legend, along with a button-down shirt, khaki pants, a belt, and boots. His shirt was adorned with three medals of unknown value. The user wears the cap. Callie and Marie are the granddaughters of Cuttlefish. Ammoses Shellendorf is another member, horseshoe crab who excelled in designing weapons and likely designed the original Bamboozler used during the Great Turf War. He is also the grandfather of Sheldon, who currently manages Ammo Knights. Judd is a feline member of the Squidbeak Splatoon who presumably joined after he was awakened from his cryogenic slumber. His exact function in the platoon remains unknown, as he does not appear to be able to manage a weapon. Judd currently judges matches of Turf War and Ranked Battle and can often be seen sleeping on a pillow in Inkopolis. Marie is Agent 2 and Moon is aware of this.

Combat: In combat, Squid Roll is a movement technique that allows the user to leap and twirl out of their ink. The player is also able to reduce a small amount of damage while acting, though excess damage will be received anyway, akin to Ink Armor. Another technique is Squid Surge, a movement technique that allows the user to climb walls and jump up high into the air.

Setting: Known as the "city of chaos", Splatsville is a city located in the Splatlands, west of Inkadia (home to Inkopolis). The main idol group in Splatsville is called Deep Cut, consisting of three members; Shiver, Frye, and Big Man.

Hobbies. Moon is a fan of Tableturf Battle, which is an in-universe collectible card game inspired by Turf War battles but turn-based and designed for two players. Both players use the cards in their customizable decks to add ink patterns to a grid-like board, competing to have the most ink on the board at the end of the game. Moon is not very good at it.